Improvement in jar movements for rock-drills



`of the same.

PATENT FFICE.

H UGO sONTAG, or OsNABROK, GERMANY.

IMPROVEMENT IN JAR MOVEMENTS FOR ROCK-DRILLS.

Specication forming part of LettersY Patent No. 117,573, dated August 1, 1871.

To all whom t may concern:

Be it known that I, HUGO SON'IAG, of Osnabrck, Germany, have invented a new and Improved Boring Instrument; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in theart to make and use the same, reference being had to the accompanying drawing forming part of this specication.

Figure l represents a side view, partly in section, of my improved boring instrument. Fig. 2 is a detail longitudinal section of the upper part Fig. 3 is a detail side view of the upper part of the shell. Fig. 4 is a transverse section of the same on the line x rv, Fig. 2. Fig. 5 is a transverse section of the same on the line y y, Fig. l. Fig. 6 is a detail top view of the ring by which the lower part of the shell is held closed.

Similar letters of reference indicate corresponding parts.

My invention relates to jar movements of drills, and consists in certain improvements thereon, which will iirst be described in connection with all that is necessary to a full understanding thereof and then clearly pointed out in the claims.

A in the drawing represents the drill-shank, made in form of a cylindrical rod of suitable length. lts upper end is swivcled in a sleeve, B, which has projecting wings a a, every wing having further projecting ears b. The shank A is fitted into a tubular shell, C, which is slotted vertically to admit the wings a a of the sleeve. In fact, the shell ,C may be composed of two semicylindrical parts, or slit at the lower end in such manner that the sleeve B and shank can be admitted and withdrawn from below by drawing the two half shells far enough apart at the lower end to let the wings enter or be moved from said slots. The lower ends of the shell are held together by a ring, c, which embraces the shell and rests on a shoulder, d, of the same. This ring has notches upon the inner side to admit the wings, whenever it is moved up past the sleeve, to let the shank be taken off. When it is used for locking the lower part of the shell it is turned on the shoulder so as to bring said notches out of line of said wings. The tubeor shell C is suspended, and at its upper end rigidly affixed to a rod, D, which is suspended from a rope or swiveled in a link, F, that is in a suitable manner connected with the raising and lowering apparatus. On the rod D is arranged a verticallyadjustable plate or valve, E, whose motion up and down is confined between shoulders or pins c f. This is connected with a rope or chain extending to the outside of the well, and by which the plate e and parts attached thereto are lifted. From said valve are suspended two rods, g g, which extend down along the sides of the shell into projecting lateral enlargements h ofthe same. Each rod g has, near the upper end of the slot in the shell, two projecting ears, i and j. The upper ear i has its lower, the lower ear j its upper edge inclined, as shown. The upper and lower ends of the ears b are also inclined parallel to the ends of said gears i j, and the upper ends of the slots of the shell are further inclined in the same direction. The upper end of each slot in the shell is enlarged laterally, the enlargements being in part covered by the ears ij. Whenever the drill touches bottom and the shell is let down the ears b will strike the upper ends of the slots of the shell, and will, on the inclined edges, be moved aside in the enlargement ofthe slots.. The wings will thereby also be carried into said enlargements and rest on the upper ends of the projections L of the shell.

The mode of operation is as follows: rIhe drill is dropped into the rock, the tripping mechanism then made to unlock the tubular shell, and the shell made to act as ahammer and strike a blow upon the bit-socket. The drill is then withdrawn and the same repeated; but if the bit becomes stuck and resists withdrawal the tripping mechanism is made to unlock the shell, which is drawn up, creating a jar that loosens the drill in its seat and allows it to be removed.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The drill-shank A, sleeve B, and slotted tubular shell C, combined to operate in the manner described.

2. A drill-shell C, having elastic prongs, combincd with a sliding` ring, c, which rests upon a 4. The sliding-plate E and rods having` inclined shoulder, d, to lock the shank and shell together, ears i j, combined with the ears b on the Wings and is moved up therefrom to allow them to be of swiveled sleeve B to form a tripping device separated. for unlocking the shank and shell, as described.' 3. The Wings a a on a sliding and swiveled HUGO SONTAG.

sleeve, B, combined With the incline and recess Witnesses:

on upper end of slotted shell, and the projection ADOLPH HOTOGO,

h to lock the shank and shell, as described. H. KNAPP. 

